Solvent-induced deposition of Cu–Ga–In–S nanocrystals onto a titanium dioxide surface for visible-light-driven photocatalytic hydrogen production

Kandiel, Tarek A.; Takanabe, Kazuhiro

doi:10.1016/j.apcatb.2015.11.036

Cited by 26 publications

(10 citation statements)

References 29 publications

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“…Compounds of the type Cu 1− x Ag x GaS 2 were tested for photocatalytic hydrogen evolution by Kaga et al, who found that the substitution of Cu by Ag provided higher H 2 evolution rates, of up to 527 μmol h −1 for the fully replaced AgGaS 2 compound when loaded with 1% Ru . Kandiel and Takanabe also used Ru as a cocatalyst, with CuGa 2 In 3 S 8 NCs, yielding H 2 evolution rates of 50.6 μmol h −1 . In the same work, the authors demonstrated that supporting the CuGa 2 In 3 S 8 NCs over TiO 2 allowed for much higher conversion rates to be obtained at low loadings, which was attributed to a better dispersion of the absorber material.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

Compound Copper Chalcogenide Nanocrystals

et al. 2017

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This review captures the synthesis, assembly, properties, and applications of copper chalcogenide NCs, which have achieved significant research interest in the last decade due to their compositional and structural versatility. The outstanding functional properties of these materials stems from the relationship between their band structure and defect concentration, including charge carrier concentration and electronic conductivity character, which consequently affects their optoelectronic, optical, and plasmonic properties. This, combined with several metastable crystal phases and stoichiometries and the low energy of formation of defects, makes the reproducible synthesis of these materials, with tunable parameters, remarkable. Further to this, the review captures the progress of the hierarchical assembly of these NCs, which bridges the link between their discrete and collective properties. Their ubiquitous application set has cross-cut energy conversion (photovoltaics, photocatalysis, thermoelectrics), energy storage (lithium-ion batteries, hydrogen generation), emissive materials (plasmonics, LEDs, biolabelling), sensors (electrochemical, biochemical), biomedical devices (magnetic resonance imaging, X-ray computer tomography), and medical therapies (photochemothermal therapies, immunotherapy, radiotherapy, and drug delivery). The confluence of advances in the synthesis, assembly, and application of these NCs in the past decade has the potential to significantly impact society, both economically and environmentally.

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Section: Catalytic Applicationsmentioning

confidence: 99%

Compound Copper Chalcogenide Nanocrystals

et al. 2017

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“…To add to the complexity of the system, some of the above mentioned factors depend greatly on the SC used. For example, the amount of the catalyst where the optimal reaction rates can be achieved may vary significantly from sample to sample, depending on the absorption coefficient, photon scattering/reflection and the catalyst degree of suspension . These issues caused inconsistencies in reporting activity and made difficult the comparison of catalytic systems reported in the literature .…”

Section: Photocatalytic Reactivitymentioning

confidence: 99%

Photocatalytic Hydrogen Production: A Rift into the Future Energy Supply

2017

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Photocatalytic hydrogen (H2) production is a process that converts solar energy into chemical energy by means of a suitable photocatalyst. After the huge amount of systems that have been tested in the last forty years, the advent of nanotechnology and a careful design at molecular level, allow to obtain attractive activity, even using pure visible light. At the same time we are approaching reasonable photocatalyst stability in laboratory test, and the attention is paid to identify cost-effective photocatalysts that might find real applications. This Review provides a broad overview of the elementary steps of the heterogeneous photocatalytic H2 production, including an outline of the physico-chemical reactions occurring on semiconductors and cocatalysts. The use of different renewable oxygenates as sustainable sacrificial agent for the H2 production is outlined, in view of a transition from fossil fuels to pure water splitting. Finally, the recent advances in the development of photocatalyst are discussed focusing on the current progress in organic and hybrid organic/inorganic photocatalysts

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“…An example of this aspect is the use of a supported photocatalyst: a uniform suspension of Ta 3 N 5 supported on inert SiO 2 spheres reduces the amount of photocatalyst required to achieve a plateau . In another example, the optimal rate at the plateau (intrinsic photocatalyst efficiency) of CuGa 2 In 3 S 8 was not perturbed with or without the TiO 2 support, and the optimal rates were identical . This suggests that the required amount of photocatalyst was reduced when the support was used, but the intrinsic photocatalytic efficiency of those photocatalysts was not altered by the presence of the supports (i.e., the photonic efficiencies are identical for photocatalysts A and C).…”

Section: Reporting the Photocatalytic Ratementioning

confidence: 99%

Insights on Measuring and Reporting Heterogeneous Photocatalysis: Efficiency Definitions and Setup Examples

2016

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Heterogeneous photocatalysis is a potentially competitive solution for the direct production of solar fuels. This research field has seen tremendous growth over the last five decades, and with such an exciting research topic, it has seenand will continue to seean increasing number of papers being published in a variety of journals. However, it is becoming increasingly difficult to compare the efficiencies of heterogeneous photocatalyst powders, because different researchers report their results in different ways. Efforts have been made to create standards for reporting data in this field, but there continues to be a discrepancy in published works. This article intends to clarify efficiency definitions, and clarify misconceptions as to why researchers should avoid reporting rates of evolution per gram, per surface area of catalyst, or as turnover frequencies (TOFs) alone, to be able to compare photocatalytic efficiency among different materials. By providing an example of a photoreactor for water splitting in the authors’ laboratory, the paper also intends to guide new researchers in the field. This article does not discuss how to improve photocatalysis but rather how to improve the reporting of photocatalysis to ensure reproducibility and effective benchmarking. Researchers should not only ensure that they have all the appropriate characterization and statistical data to support their claims but should also recognize that improperly reported data may lead to faulty benchmarking that prevents their results from being compared with those of other photocatalysts, inhibiting the progress of photocatalytic research.

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Solvent-induced deposition of Cu–Ga–In–S nanocrystals onto a titanium dioxide surface for visible-light-driven photocatalytic hydrogen production

Cited by 26 publications

References 29 publications

Compound Copper Chalcogenide Nanocrystals

Compound Copper Chalcogenide Nanocrystals

Photocatalytic Hydrogen Production: A Rift into the Future Energy Supply

Insights on Measuring and Reporting Heterogeneous Photocatalysis: Efficiency Definitions and Setup Examples

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